Synthesis and photophysics of red emitting RNA templated PbSe nanostructures

Kumar, Anil; Singh, Bhupender

doi:10.1039/c0cc04177g

Cited by 14 publications

(36 citation statements)

References 13 publications

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“…The biogenic system is not limited to using bacteria, actinomycetes, fungi, and yeasts to produce NPs; instead, plant or algae extracts and even informational biomacromolecules, including proteins, polypeptides, DNA, and RNA (as other sources of biological materials), can also be applied to produce NPs [51]. For example, informational biomolecules (DNA and RNA) can be applied as building blocks capable of potentially supplying a set of chemical functional groups (e.g., phosphate backbones) that hinder the size and shape control of biomineralized nanomaterials [64,65].…”

Section: Biogenic Synthesismentioning

confidence: 99%

Metal, Metalloid, and Oxide Nanoparticles for Therapeutic and Diagnostic Oncology

Yazdi¹,

Sepehrizadeh²,

Mahdavi³

et al. 2016

Nano BioMed ENG

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Nanoparticles have comprehensively affected various sights of human life. Through the wide range of claims about nanosized particles and their functions, biomedical applications are of much interest among health care researchers due to the nanoparticles' potential for use in the process of disease diagnosis, control and treatment. In this regard, inorganic nanoparticles, which have high potential in diagnostic and therapeutic systems, have recently received much attention in oncology. Although inorganic nanoparticles initially seemed an appropriate tool for cancer imaging and diagnosis, their ability to attack cancerous cells as anticancer drugs or carriers in other drugs has also demonstrated promising results. The present review primarily provides a brief survey of various studies in which metal nanoparticles such as gold, silver, iron oxide, and metalloid nanoparticles viz. tellurium and bismuth were exploited for therapeutic or diagnostic purposes in oncology. Then the application of selenium nanoparticles as a therapeutic agent against cancer in in vitro and in vivo studies is reviewed in detail. Although inorganic nanoparticles seem to be useful tools for cancer imaging and diagnosis, their potential for attacking cancerous cells as anticancer substances or even carriers for anticancer medications should not be underestimated.

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Section: Biogenic Synthesismentioning

confidence: 99%

Metal, Metalloid, and Oxide Nanoparticles for Therapeutic and Diagnostic Oncology

Yazdi¹,

Sepehrizadeh²,

Mahdavi³

et al. 2016

Nano BioMed ENG

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“…RNA has been demonstrated to be an outstanding biotemplate for controlled synthesis of metal and semiconductor nanomaterials, such as Pd, Ag, CdS, PbS, and PbSe (Figure C–F) . Particularly, RNA's sequence flexibility, composition, and structure hold enormous potential for the designed synthesis of nanomaterials.…”

Section: Bioinspired Synthesis Via Bio‐macromolecule Regulationmentioning

confidence: 99%

“…Moreover, certain reaction parameters, such as the types and amounts of metal ions, may significantly influence RNA folding and self‐assembly for biomimetic synthesis. For instance, different levels of Zn 2+ ions induced the folding of RNA to produce a honeycomb‐like porous PbSe super‐nanostructure and PbS nanowires (Figure B–D), whereas Pb 2+ ions induced the production of PbSe nanotubes …”

Section: Bioinspired Synthesis Via Bio‐macromolecule Regulationmentioning

confidence: 99%

Biomimetic and Bioinspired Synthesis of Nanomaterials/Nanostructures

2016

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In recent years, due to its unparalleled advantages, the biomimetic and bioinspired synthesis of nanomaterials/nanostructures has drawn increasing interest and attention. Generally, biomimetic synthesis can be conducted either by mimicking the functions of natural materials/structures or by mimicking the biological processes that organisms employ to produce substances or materials. Biomimetic synthesis is therefore divided here into "functional biomimetic synthesis" and "process biomimetic synthesis". Process biomimetic synthesis is the focus of this review. First, the above two terms are defined and their relationship is discussed. Next different levels of biological processes that can be used for process biomimetic synthesis are compiled. Then the current progress of process biomimetic synthesis is systematically summarized and reviewed from the following five perspectives: i) elementary biomimetic system via biomass templates, ii) high-level biomimetic system via soft/hard-combined films, iii) intelligent biomimetic systems via liquid membranes, iv) living-organism biomimetic systems, and v) macromolecular bioinspired systems. Moreover, for these five biomimetic systems, the synthesis procedures, basic principles, and relationships are discussed, and the challenges that are encountered and directions for further development are considered.

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“…These particles were synthesized using a previously reported protocol. 17 Colloidal PbSe nanoparticles were prepared by varying the [RNA], the molar ratio of [Pb/Se] and the pH. The resulting colloidal PbSe solution was brown in colour and varied in intensity.…”

Section: Synthesis Of Rna-templated Colloidal Pbse Solutionmentioning

confidence: 99%

“…In a previous study on this system, we had investigated RNA templated PbSe nanoparticles, where for the first time these particles were reported to have fluorescence maxima in the red region peaking at 770 nm covering the visible range (690-800 nm) with a quantum efficiency of fluorescence of 0.018 ± 0.002%. 17 The present study has been undertaken to probe the fluorescence and absorption characteristics of RNA templated PbSe more comprehensively in the entire UV-Vis-NIR range. The effect of the amount of RNA, pH and molar ratio of Pb/Se on their optical properties has been analyzed.…”

Section: Introductionmentioning

confidence: 99%

Optoelectronic properties of dual emitting RNA-mediated colloidal PbSe nanostructures

Kumar

Singh

2013

Dalton Trans.

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This paper presents the optical and photophysical properties of RNA templated PbSe nanostructures in the presence of excess Pb(2+). These particles exhibit an onset of absorption in the NIR range at about 1208 nm (0.97 eV) and display weak excitonic bands at 320 nm, 405 nm and 670 nm. The excitation of these particles by 670 nm light causes dual fluorescence in the red and NIR region peaking (range): at 770 nm (690-850 nm) and 1000 nm (850-1150 nm), respectively. The quantum efficiency of fluorescence in the red and NIR region were estimated to be 0.018 and 0.27, respectively. Fluorescence due to freshly prepared colloidal PbSe in the visible and NIR range is observed to have a fairly long lifetime of 320 ns and 31.8 ns, respectively unlike those of organic fluorophores emitting in this range. Aging of these particles leads to a change in morphology from QDs to nanotubes, which is associated with a decrease in absorption coefficient in the visible range along with an increase in absorption in the NIR region. These nanostructures become less emissive and depict a shorter emission lifetime. The poor absorption in the NIR range and a fairly intense fluorescence in the wavelength range of 850-1150 nm make these particles highly suitable for bioimaging of tissues.

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Synthesis and photophysics of red emitting RNA templated PbSe nanostructures

Cited by 14 publications

References 13 publications

Metal, Metalloid, and Oxide Nanoparticles for Therapeutic and Diagnostic Oncology

Metal, Metalloid, and Oxide Nanoparticles for Therapeutic and Diagnostic Oncology

Biomimetic and Bioinspired Synthesis of Nanomaterials/Nanostructures

Optoelectronic properties of dual emitting RNA-mediated colloidal PbSe nanostructures

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